FAB.Group should also have a `size` prop similar to FAB

[ldorigo]

Is your feature request related to a problem? Please describe.

The FAB component has a size and customSize prop allowing to modify its size. So do the individual actions within a FAB.Group, however, from what I see the FAB.Group itself has no way of being resized.

Describe the solution you'd like
Similar props as FAB allowing to use predefined small/medium/large sizes or custom ones!

[rmdevtorres]

+1

[hamzawii]

+1

[wolak]

Any update on this? Seems like an obvious miss